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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a4787a9b9a68aebdaf2a124d96d70091577acddff4a15ab288155c3bc54ed2e7' 
  AND token = '2UEWkkWHT5+a/Y3L3w1l65YXtfZ6tllulFw+dVTwrA0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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