Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3dc718f8c3e2eb63996525b68fa1c74649b8cbb2e83662dc2f134c30e7575bdf' 
  AND token = 'sSTVccG4LexYnaY2gzaIpuQpaYfJDC2VQw4e0zWpk6w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}