Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0716fac786fb9440ff375ec957b5b8d64f5502edb47562ecb954be873d9440dd' 
  AND token = 'j4lL2B1/jYOC89nl84r9su13xdljIF9D0UPqBRDCv/Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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