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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1959305d12eeb2ff6e6c4865363b9669edb6eaf6a539fb6acfcc229110f3aaf3' 
  AND token = '46ELA0M3Pnki+0HV/HyiATM3ZdOj0mfLFUR4jpKkNLw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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