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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4aae11798cd0ccef5a4f21b1591e4a5a4bacfb4ad2f7ced9bae0245a2efea0f' 
  AND token = 'zmc3e1Z4XLkjV1LIPmtxy7WjSxsxm8QyOJgfiUz2Wyc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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