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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a8addbc9e97792b6f7f70d3b392b1bdf97e4aedb6c67b2403b3914361e780dd' 
  AND token = 'HBmu9QVnLC07m9rmMs13Dp4S488oXzJjmS54OHFNHIo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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