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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a0f9598c21ac5859abddfdab40186fe79c37061df61fe3a3d1e84e00ab345e8b' 
  AND token = 'aYoqYzVwRlw+B3O7Ciyzp32Of6C57jRg17yDf4yBZ8U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}