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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b44bf3089474fd09e324ba419a05cc68e5630fe0e4f4475a6a660de56a92c1c4' 
  AND token = 'CsuZZdHIfSriYhW1tJR0pXJ2WqbHU689gDWh35PsoqQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.01970

JSON explain

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