Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b9e75001976e4c965d5a5caa1589ec3cebc0be5d0262bb0067b25ff3fdfd88a' 
  AND token = 'tB11N1vvFeg0zcQt83vhvlBV+efPoCsQ7K42Kmi6ZUs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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