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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10af226890e39c5380149ec01cc488cc0207dfd6d7f0ddce7ca5908a67a9a047' 
  AND token = '4iXcX6wRHidTU8U9c6wK5G3huOOxclSvopaepEbAdrk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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