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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '229cfb4c97f47909824d6be1eb9b174b8019c7161096f4c2f2da5e1053fa2632' 
  AND token = 'gVbf++03ISRnhaFvgE03alSFD4LM8nPqmelHOYh02yA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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