Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab1a5fc6d571e72274fdb8c0974c375c15dfde9c07716b9f8aea4420264da6b7' 
  AND token = 'd40fepw+iHABrkV13hXToG3+HYT1q9ad9r3GppiH00A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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