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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4e570c892d7625e58362bd98e4c382c72d28e3e15e887422b89b23b2186443f' 
  AND token = '60yur6t+l8bA+jTJaI21oGPNTC6X0KXzAW06mVEyTj0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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