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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '744b1b8489a0ce19f30e8f6874f6d9bece89f3f6d177a647590059c62544e5fa' 
  AND token = 'iTNJqyIVReZLn2nM0WuH7T4Do01r7QENP4DEtl8ZEr8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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