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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a817185de4a5b55bdf0cf3d8860f0bc2202ab88703c65b1663333db21dc2cdc' 
  AND token = 'boHGDOzgbpWKn9C0pk8psC2XR7C1zTlcDjDlEqEF3jQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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