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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '183bb8b713da7b334d7b871eb52d0f6ed389a718547dd0d8f6065862ea2d43e8' 
  AND token = '2Vy2a0m1fbqkW6kLHu4JsOCjhKsuyrwqQ7O73bKdeNs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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