Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5bc9237525c86cabb3925ea3b11543f5266aabbbb831342eab6c20ccd02d735a' 
  AND token = 'edNG9TVaFPNjoyPHYPmEQwkxIGk11vE8dSA+5l/X92A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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