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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2d700e9f0af6bff32da1cb7674aca2a9b363839ca71e936ec377f679a57ca39' 
  AND token = 'Pn5SLzM09n7bw43FwMfivv/HHzw/LrhiwpdwKZfHQFg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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