Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b5acd75c1695a4de19601114f1164fb707e25f66f90c8b9e125fb6e2dd30fc8c' 
  AND token = 'TEDmTLN4jArHRzJ58si3PszcIT7N45AT8hMTRvcOgqo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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