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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd3adafadbae588381c811397082e867c634d06af3e75de00060d8464dd82dd8a' 
  AND token = 'uifq2yST+IqkWaN6iJwoRXOcGX1pUhQ6Kg3aopRlxlE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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