Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c726037793fce3c65962a4d7a3cc48bf3732260a5c67532c045513e06aa5ad9' 
  AND token = 't2GgBsStEKIyzdvAeOi9iqF0Mx0biJb+xkeIlSIPTfA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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