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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '019285aebc559decb73931a2faec21a6347f617c46d3af09d09dbb812d2b9f03' 
  AND token = 'piha128bY1ym/yjaW/fGeyhxTWQB+Nu5Q/pXHPuZ2cM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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