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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3a60b85b3791269905d1c5b84f63f06ee449c77584ee4c7688873573ba6ae20e' 
  AND token = 'aHjqnQr6Gz7ZiimmVdLeqNYTQ7U3mhDbETan20lqV5c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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