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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd07bc14a8191e59fd180cbebf8e0ffe10dd0280563c727264b7421e98cad1476' 
  AND token = '2Zn2ZnoCjocNLQ9En8H+F+r8nc/JSvJmC8hL1h4MffI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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