Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f0292398e1b2e65ad9ee4d2de5f4b5767ecd6900c1e193d64ee0ea3b99d31dc3' 
  AND token = '37LfxSDhvcfuFwtXZM4O/Vvw3eGymm4nL1u40hWNpQ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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