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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cefff62fd46f3723de5332b6145913c095d17c17a70a612f99d57f5831d3213b' 
  AND token = 'anQjD0zl2NUIFgl3jmcqaLxWk1DZ6SleJd+r6CrBrWo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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