Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37bce573226808873cd67e83a6d6e9cd54960b9a0583a59bf59245b2b3a5624a' 
  AND token = 'alOmGw6QBFQRpAf5vbdWYe54nfom+ksAE6a6cNtNIis=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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