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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a124c66b5d706e073c1de225b97c0a16450c95470659730ce5a550b1b78c12e' 
  AND token = 'HqgFmkCw76GFREzhqgWahImpohbIV2vhoNi9OFLwKP8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00150

JSON explain

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