Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c8952cb8a550355cdfae6bf763bd7afea95d41528b68b7fe3c019746fcc65ed6' 
  AND token = 'NPcXMNhgSYZwaxaWeQDp3G4GRo0O5yLXrOXO+g6bgIA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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