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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cc6e4fba7b8158d9d6497da4b185dd18ebe4bb3b03cbafb98d0f8ff5feb35ecc' 
  AND token = 'LnLPrHGJEs6se8FyBZrv1Aqkr+W9zio3AKYBWspczak=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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