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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2462ce6cfffed0c75d2e4139db2df58572260c479f83eb7b9f0975973126de3' 
  AND token = 'pbBdSN3wgBCvMDbEaf4D/7d0B9Nk0flRKjdArC6TVIU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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