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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ed4f7cd0c34f8b9a0555d8333b24635efa7b42ead001b3038ce7e4393a39d70' 
  AND token = 'PascY9puoKAzgG/iiAYueayLbUjkFsTzZ6Hl595nH9w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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