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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '005de4ef66c49a3d980057c2aa63754f929767243e42b2323ebc1e15e1a71959' 
  AND token = 'A4UOrxD39b0HJgxJ1SR2kMmaFmJyLh4Cfl03fA8jjfM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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