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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1042216d1a67d9912d7388e616053c7465412ed6fb180fda5e8b4389ccf4a154' 
  AND token = 'oreAByjTF8LM5qVpgOAxi3qeeXdBl8pnxspPJx8yW+Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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