Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '345985eae075354a398b2d1f37b22f4b4f5bc212c9e2a8bb28423053f69ce7e7' 
  AND token = 'WVeHrnMkzwwMM4lsdYCG2Y5YjzJUrVIIaHE/paGQYw4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}