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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5074822512c8576ab8b63ba5ecd920f51fc28ebe3c326eca725e2538db490d02' 
  AND token = 'dAteJLiVayJj5dfDkz5bD9d7Y9GTBkX+FZPmFT348HA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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