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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07e7cd87cdbb4d4d7e2a9f2b718d58a23e33a5e387ca99e29d9899adf9237984' 
  AND token = 'WWlZ7aIfUp93FEaha9TQcT4EMB4/RhEI93JM7HygwzQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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