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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7bc205f9461a5bc26138f12e8b790f51eb7b93d5e4b363b05db4a24e451a04fa' 
  AND token = 'G4M+lcnv5RjDr9RP6Mic0kIafxJX+L6QVc814z0rT+0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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