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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '118b71ebaf45aef6894135b7a9b6da434783f7c11cc3b6ad4152f7d7aca64c74' 
  AND token = 'SQXRAeK7h9yFE6ykJ5zxPGuxsfrqYt2wt8444s2Aamg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00074

JSON explain

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