Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aafc2c9022d1d293ece88e4f407d03e8aa000beeb9ee0807fb712dac364a2d68' 
  AND token = '56e/pOSFbyeET9qdA+GL/YOUD8FrTIIzbk9Rhzdmy4E=' 
  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"
    }
  }
}