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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2072c05dbb9f5bd34dbd81ee4d92eae2e62e931de119adacac81fb4fcd306149' 
  AND token = 'AT73w6S3moBZ6prbYezU1JL7exapBJMi2+DNxMQ2uds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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