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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0133fe7ef7151b3f23ac643fa628dc2722fe07f5671509a15005c08c215351a0' 
  AND token = 'Wnkq3lw4o9+kV0eJnQQli2DXIDf3TAEsuX4BwoVVWeU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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