Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'df531cc23765f2c3d4f288548ff93c57080a97aa02ce37cf4e8e83c98b5edb58' 
  AND token = 'lmUlEZuUeVMux0a9DThZ4qTIpmRhfB5NCLaICIv81B0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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