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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '117db57793a2c02ddedffbc7014abd266a802a50c40a611d071524cd4fa28233' 
  AND token = 'T84KyQ0tH0FVNk9Jjbq8c3+HOs9dsJu+UitlANbem58=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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