Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '165947e6f4f1b55a2b082a622a7657d32b1bd703f363f3ae25b8876cb298e372' 
  AND token = 'C/OFwbGccEnP1aI71oGlO11mgylyDMLDSriNIIRVelM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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