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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05319e29a4b51571b76e3d08a3c28ea74e5895ee08d55a868976959862c8c00b' 
  AND token = 'EfirreqH/YX7FwgLK823iVX3PH5W5GOjtqD9wnsbhKM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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