Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a2045d4ce868cbcbecc6a588febfb5234efce009272369fe715686890516b9a' 
  AND token = '+C7zIQ2HXIKoJ5vlIhRQllXYr1orYhk23FhOsEnnoCI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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