Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c4a34548c78389d57eb643cb13ad85eac8bb697390712ee619cec589e51e6c5' 
  AND token = '575ArpEWaeuNCBkYQmF0DoLBIRBPL4Ds3yFOS7o+Fl0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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