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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3002a01e300e70de54efed5bc293631bf42192dc2436ffb341da6eae5563855' 
  AND token = 'SvYQuo6Nli5C+S+RNVe9xGkj4QM/NYwPXvPI+JArs18=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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