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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e1475c3199c66a3c5f5a69879d5a5e61bceb6154ae9b475ed3a04eafa4fa626' 
  AND token = 'o1qoc0oA1cMlaryflOm/B9cWWF8w0C8EYitO2ErlByE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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