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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '24904d6169451d2f430c0d9ff174239ddb3d86ddb0c356760f4b83aa7c6fde26' 
  AND token = 'gpP7yr8idG2xSTatluAwjuJcXFWFqLaPTm8dL8ipzRY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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