Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3ebfe8645c86c215222afd5143d9c50d37c579ee378f25f948f7751e51cca49' 
  AND token = 'o+ArgZdzCYPm5/5LZt9Rdi+y8zb1I2HzoOM19+EEsdc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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