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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ca32dd9dc5261da66790a409cd9c72682922ec7c983050935b18b1697a7e7e1d' 
  AND token = 'CUZXniEdfc0CxhhkUvEuAISJ0mKN8YwaBaAx7RP76Rc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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