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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9aa9e0af5a7f4a3c118070db333c5554eb34e331546944c0df56500f9a70749e' 
  AND token = 'nspBNDJKKsIJR3HS6+zw9iwVwPvwhLaQ48LHJPj5I90=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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