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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd669187cd74d0f429f355a3accd67e62d8b740920abad16179f0caa8838b2aac' 
  AND token = 'MjVG4pJQm2IJ8PGYfYM0pv45dAbHKNU5Uvn2e96K2fo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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